Re: [PATCH v5 00/16] HWPOISON: soft offline rework

[osalvador]

On 2020-08-04 03:49, Qian Cai wrote:
> Well, each iteration will mmap/munmap, so there should be no leaking.
>
> https://gitlab.com/cailca/linux-mm/-/blob/master/random.c#L376
>
> It also seem to me madvise(MADV_SOFT_OFFLINE) does start to fragment 
> memory
> somehow, because after this "madvise: Cannot allocate memory" happened, 
> I
> immediately checked /proc/meminfo and then found no hugepage usage at 
> all.

Unfortunately I will be off for a week, but out of curiosity, could you 
try out with below tree [1] and see if you still see those issues?

Thanks for your time

[1] https://github.com/leberus/linux-mm-1/tree/hwpoison